When diagnosed with breast cancer in 2013 at 33, she had just settled back into working life after getting married and spending a year backpacking round the world.

“I noticed one of my nipples was inverted and when I Googled for answers, I thought: ‘Oh God, this can’t be me.'”

Three years later, after surgery to remove one breast, chemotherapy, radiotherapy and another major reconstructive operation, Kreena felt she was out of the woods.

She had even arranged to have some of her eggs harvested, so that embryos could be created and frozen in case the cancer treatment made her infertile.

But then on a trip to Canada “to celebrate the end of my life with cancer”, she felt grim.

She was tired, her chest was tight and she was struggling to breathe. Hospital doctors were baffled, until one cardiologist made a crucial link.